Lighting-fixture.



B. LONG 81 W. C. BURTON.

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IBRECKINRIDGE LONG, OF ST. LOUIS, AND WILLIAM C. BURTON, OF WEBSTER GROVES, MISSOURI.

LIGHTING-FIXTURE.

Specification of'Letters Patent.

Patented Jan. as, rain;

Application filed July 25, 1917. Serial No. 182,781.

To all whom it may concern:

Be it known that we. BR'ECKINRIDGE Lore and VILLTAM C. Bun'rox, citizens of the United States, residing at the city of St. Louis, Missouri, and lVebster Groves, St. Louis county, Missouri, respectively, have invented a new and useful Lighting-Fixture, of which the following is a specification.

This invention relates to improvements in lighting fixtures, and consists in the novel construction hereinafter disclosed.

An object of the invention is to provide a lightil'lg fixture including a combination of reflectors whereby the direct rays of the illuminants mounted in the fixture are deflected out of the line of vision of one within the area lighted by the fixture, the rays of light being reflected and diffused over an area below the fixture in such a manner that the light will be equalized over the area illuminated.

Another object of the invention is to provide a fixture including a combination-of reflectors, one of whichis arranged below the illuminant and the other of which is superimposed over the illuminant, the reflecting surfaces of the lower reflector being arranged in planes thatintersect the reflecting surface of the upper reflector at an acute angle, whereby the direct rays are reflected against the upper reflector at such angles that the direct rays of the illuminant are invisible from below and are deflected and equally diffused overthe illuminated area.

Another object of the invention is to provide a lighting fixture adapted to illuminate by indirect reflection a translucent areabelow the fixture. V

Other-features of the invention will appear without specific mention from the following detailed description of the construction taken in connection with the acco1npanying drawing, in which- 7 Figure 1 is a transverse section of a ceiling and roof construction showing the man ner in which the fixture of the present invention is arranged in connection therewith.

Fig. 2 is a plan View of the fixture of the invention.

Fig. 3 is a side elevation of the fixture partially in section. i

Fig. 4: is an end View of the. invention. As appears from the illustration of the embodiment of the invention shown in the drawing, the fixture is designed so that it may be installed in sections in the ceiling construction of a room or compartment to be illuminated.

In Fig. 1 an embodiment of the invention is illustrated in connection with a roof and ceiling structure in which the fixture is supported by the roof supporting frame 1 be tween the roof 2 and a translucent ceiling 3. The particular embodiment of the invention shown in this view merely serves to illustrate a satisfactory installation of the fixture, it being understood that, of course, the use of the invention would not be limited to any particular design of roof construction.

The fixture proper includes a base memberin the form of an open conduit -.l-, the upper edges of the side walls of which are deflected outwardly, as indicated at 5. The conduit 4 has openings at each end in which are arranged bushings 6 for the reception of the lead wires of the electrical connections. A bottom strip 7 is attached to the lower side of the conduit 4: and constitutes means for coupling one unit or section ofthe fixture with another, it being understood that where the area to be lighted is greater than the length of one unit or section, a plurality thereof may be connected together and used in a longitudinal series to extend the length of the area to be illuminated. Fitted to the top of the conduit at and between the flaring edges 5 thereof is a troughshaped reflector element comprising a bot tom wall 8 and upwardly inclined side wall 9, the outward angle of inclination of the side walls in respect of the bottom wall being obtuse. The bottom wall 8 of the troughshaped element constitutes a top wall for the conduit t and has arranged at intervals throughout its length a plurality of sockets 10 in which the lamps 11 are mounted. The inner surfaces 12 of the walls 9 are reflecting surfaces so that the rays from the lamps 11 are reflected upwardly.

At the ends of each fixture unit or section is arranged a support for the upper reflector. The support as illustrated in the drawing comprises a metal plate bent in the form best shown in Fig. 4, from which it will be seen that the same includes side arms 13 extending obliquely upwardly in the same plane with the inclined walls 9 of the lower reflector. .At their upper ends the Kill from view from below the fixture.

arms 13 are deflected inwardly at an acute angle to provide the inclined sections 1st. The inner ends 15 of the supporting arms are in a horizontal plane The upperreflector is composed of a central horizontal portion 16 and downwardly inclined sides 17 and is mounted upon the supporting members to which it is riveted or otherwise secured by suitable connections. The upper reflector is preferably composed of sheet metal having a lower reflecting surface 18 and having its edges back-turncd as shown at 19, to impart rigidity thereto. It will be noted that the walls 17 are arranged at acute angles relative to the planes of the walls 9 thus serving to effect indirect reflection and greater uniformity in ditiusion of the rays of light.

Fig. 1 adequately illustrates the utility of the fixture for lighting a room or compartment which is provided with a translucent ceiling. Several sections 01 the fixture units are arranged end to end upon a supporting beam for sections of the translucent ceiling, the upper edges of the side walls of the lower reflector extending to a plane above the line of vision of any one within the area of the room or compartment lighted by the fixture. The direct rays of the individual illuminants therefore cannot be seen, but the light that is reflected into the illuminated compartment below the ceiling is a diflused indirect light, being of substantially equal strength throughout'the illuminated area. The dotted lines in Fig. 1 indicate the manner in which the direct rays are eliminated The direct rays from the light are reflected upwardly and deflected outwardly by the upper reflector through the spaces at either side of the fixture between the upper edges of the walls of the lower reflector and the inner surface of the upper reflector.

We are aware that the embodiment of the invention may be modified in numerous particulars and still retain the principles within the spirit and scope of the invention; We

do not limit ourselves therefore to the exact flecting walls at the sides of said central portionextending over the side edges of the V walls at the sides of the illuminant support.

2. A- lighting fixture, comprising a support including a plurality of lamp sockets arranged in longitudinal series, and upwardly diverging reflecting walls at opposite sides of said support having their upper edges in the same horizontal plane, .in combination with anupper reflector composed. of a central horizontal reflecting Wall above inclined downwardly from the horizontal wall at acute angle-s relative to the planes of the first-named reflecting walls, said side walls being wholly outside the vertical planes in which the upper edgesof the firstnamed reflecting walls terminate.

3. A lighting fixture, comprising a support, means'in said support formounting an illuminant therein, and upwardly diverging reflecting walls at opposite sides of said support, in combination with an upper re flector including a horizontal downwardly reflecting wall extending on both sides to the vertical planes in which the upwardly diverging reflecting walls terminate, and. a downwardly reflecting side wall inclined downwardly from the horizontal wall at an acute angle relative to one of the upwardly diverging reflecting walls, said side wall being wholly outside of the vertical plane in which said lastnamed upwardly reflecting diverging wall terminates. V

4. In a lighting fixture, the combination of a horizontal translucent wall, with an illuminant support above said wall, reflecting walls extending upwardly and outwardly at the sides of said illuminant sup port, an illuminant carried in the support intermediate of said walls, an upper reflector including a horizontal wall arranged parallel with the translucentpwall and ex tending over the illuminant, and. downwardly inclined walls at each side of said horizontal wall. 7 1 i 5. In a lighting fixture, the combination of a horizontal translucent wall, with an illuminant support above said wall, reflecting walls extending upwardly and outwardly at the sides of said illuminant support, an illuminant carried in the support intermediate of said walls, an upper re-" flector includinga horizontal wall arranged parallel with the translucent wall and extending over the illuminant, downwardly inclined walls at each side of said horizontal wall, and supports at each end of the illuminant support for supporting said upper reflector in a position'that the clownwardly inclined walls of the upper support will be equidistant from the illuminant.

6. In a lighting fixture, the combination with a support, lamp sockets carried by the support, and upwardly diverging reflecting walls in connection with the'support at each side of the lamp' soekets, of a translucent wall arranged below said support, and a tri-lateral reflector arranged above said suptill port, one of the walls of said upper reflector extending over the ax1s of the support at either side thereofin a horizontal plane and the other two walls of said trilateral re flector extending at acute angles relative to the support and being equidistant therefrom.

7. The combination with a translucent wall, of a lighting fixture supported above said wall comprising a lamp socket support, upwardly diverging reflecting walls at the sides of said support, upwardly extending arms attached to said support, an upper reflector carried by said arms composed of a horizontal central portion above the di- 'erging reflecting walls, and downwardly inclined walls at each side of said central refleeting wall, said side wallsbeing disposed at acute angles relative to the planes of the first-named reflecting walls.

8. A lighting fixture, comprising a lower translucent wall, a support above said wall having outwardly diverging reflector walls in connection therewith, lamp sockets in said support, an upper reflector arranged above said support including a central portion disposed in a horizontal plane above the lamp support and approximately co-extensive with the space included between the diverging reflecting walls aforesaid, and side portions inclined downwardly at acute angles relative to the planes of said firstnamed reflecting walls and extending a considerable distance beyond the vertical planes in which the side edges of said first-named reflecting walls termlnate.

A lighting fixture, comprising a translucent wall, a support mounted above said inclined portion at one side of said central portion extending at an acute angle relative to the plane of one of said first-named walls for a considerable distance beyond the ver tical plane in which the upper edge of said wall terminates.

10. A lighting fixture, comprising a translucent wall, a support mounted above said wall, lamp sockets carried by said support, lamps in connection therewith, a reflector arranged above said lamps having a central portion extending over said lamps a considerable distance, said central portion being in a plane parallel with the translucent wall, and a downwardly inclined wall at one side of said central portion arranged in a plane at an acute angle to the said translucent wall.

BRECKINRIDGE LONG. WVILLIAM O. BURTON.

topics of thispatent may be obtained for five cents each, by addressing the Commissioner of IPatents,

Washington, I). G. 

